Machine for mounting incandescent-lamp filaments.



G. F. ATWOOD. MACHINE FOR MOUNTING INCAWDESCENT LAMP FILAMENTS.

APPLICATION FILED JAN. 3|; 19lo- Patented Jul 6, 1915.

2 SHEETS-SHEET I.

WITNESSES:

1" ATTORNEY G. F. AIWOOD. MACHINE ron moumme mcmsscsm LAMP FILAMENTS.

I APPLICATION FILED JAN. 3 I910- Ll%5 66@@ Patented July 6, 1915.

2 SHEETS-SHEET 2- My-WW m @5. 5% BY ATTORNEY GEQRGE F. ATWOOD, 01E NEWARK, NEW JERSEY, ASSIGNOR T0 WESTINGHOUSE LAME COMPANY, A CORPORATION OF PENNSYLVANIA..

MACHINE FOR MOUNTING INCANDESCENT-LAMP FILAMENTS.

Specification of Letters Patent.

Patented July 3, 1915..

Application filed January 31, 1910. Serial No. 541,106.

To all whom it may concern Be it known that 1, German F. A'rwoon, a citizen of the United States, and a resident of Newark, in the county of Essex and State of New Jersey, have invented a new and useful Improvement in Machines for Mounting Incandescent-Lamp Filaments, of which the following is a specification.

My invention relates to machines for use in the manufacture of incandescent lamps, and it has for its object to provide a machine whereby filaments may be securely and expeditiously applied to the leading-in wires of lamps or to other supports therefor.

The invention is particularly useful in the construction of the lamp that is set forth in latent No. 976,248, in which lamp, the end portions of the filament are wound around, or otherwise embrace, the end portions of the leading-in wires, and the extremities of which are fused, or are otherwise joined, to the extremities of the leading-in wires.

Figure 1 of the accoinpanying drawings is a side view of a machine constructed in accordance with my invention. Fig. 2 is a view, in end elevation, of the same machine. Fig. 3 is'an enlarged. side view of one of the parts of the machine. Fig. i is a. face view of the same part, also in enlargement, and Fig. 5 is a perspective view of the supporting clamp for the lamp stems.

T he machine comprises a rod or standard 1 ha ving a bearing block 2 at its upper end in which a. shaft 3 and a sleeved that surrounds the shaft are mounted for independent rotation, the sleeve and the shaft being separated by means of an insulating bushing 5. The shaft 3 and the sleeve i: are driven, respectively, by means of fiber or other suitable insulating pulleys (3 and 7 that are 01)- eratively connected, by means of belts 8 and 9. to other pulleys 10 and 11 that are rotatabl y mounted in bearing blocks 12 carried by the standard 1 and may be operated manually, or otherwise, as desired.

Mounted upon the end of the sleeve 4:, op-

posite the pulley 7, isafrai'ne comprising a centralibloclnl l, that is secured to theslecve i, and rods 15 and 16, that project from opposite sides of the block 14'. Upon the rod 15, and adjustable longitudinally thereof, is a block 17 having a socket 18 for the reception of a supporting pin 19 of a work-holder or clamp 20, (Fig. 5), the work in the present instance consisting of the stem 21 of anincandescent lamp through which leading-in wires 22 and 23 extend. The work-holder consists of a block 24 having a ihshaped slot or recess, in which the cylindrical portion of the stem 21 is seated, and a spring clip 25 for clamping or securing the stem in the vshaped seat. The rod 16 carries a block 26 that is adjustable longitudinally thereof and supports a wire mandrel 2?, ove which a of the wire 22. Rotatably mounted upon the face oi the p ate 30, and at one side oi the rod 31, is another quartz or other insulating rod or mandrel having a pulley or brake wheel 33 secured thereto adjacent to the plate 30. A cord or band 3 that passes over the pulley or brake wheel, is secured, at one end, to a helical tension spring 35, whereby it is maintained taut, and at its other end to a screw 36, whereby its tension may be regulated. Projecting from one face of the pulley 33, parallel and adjacent to the rod or mandrel 32, is as, pin 37 between which 'and the mandrel 32- one nd of the filament is held. during its application to the leading-in. wires 22 and 23.

interposed between the member 30 and the block 1% is a helical compression spring" 38 whereby the shaft 3 and its associated parts are caused to rotate simultaneously with the sleeve 4% when the actuating force is applied only to the pulley 7. Because of the greater weight and inertia of the sleeve 4: and its associated parts, however, the

spring 38 is ineffectual to cause rotation of the sleeve 4: and its associated parts when the zllctuating force is applied solely to the pul- The shaft 3 and the sleeve 4 and their associated parts are'insulated from each other in order that currents may be independently supplied thereto. Current may be conducted to the shaft 3 by means of a resilient strip or arm 39. that bears against one end thereof and is connected to asuitable-stnirce of current, such as a battery -10, the current being conducted through the shaft 3 and the memher 30 to the pin 37, which, accordingly, constitutes acircuit terminal.

In the operation of the machine, a lamp stem is placed in the holder with the laterally bent extremity ot one of the leading-in wires 22 inserted in the end aperture in the positioning and supporting member 31. One end of the filament 28 is theirinscrted in the space between the pin 37 and the mandrel 32, the pin 37 at this time being revolved so as to be at the greatest distance from the rod 31. It the filament is composed of tungsten, or of other material that must be heated inorder to render it pliable its other end is connected to the other terminal of the battery 40. While the filament is in a pliable condition, the pulley 10 is rotated manually to wind the filament around the laterally projecting end portion'of the leading-in wire 22, the mandrel 32 being rotated and the pin 37 revolved by the tension thus placed upon the end portion of the filament. which is thereby unreeled for application to the leading-in wires. This feature of the machine should be noted particularly, since, by means there- 'of, the filament may be wound around the ,leading-in wire 22 without being subjected to undue tension and without being required to slip around the leading-in wire to permit of applying a suflicient number of convolutions thereof thereto. The cord 5% serves as a brake for the movements of the parts 32 andfi'l, and tension upon the filament may be regulated by means of the screw 36. The frame l415 16 is next rotated so as to revolve the lamp stem and the mandrel 27 and to permit of wrapping the filament around the mandrel, of bringing it into engagement with an intermediate support 41, and of winding it around the laterally projecting portion of the leading-in wire 23. the member -30 being rotated simultaneously with the frame because of the pressure ex erted upon it by the spring 38. After the filament has been thus applied to its sup ports, the free ends of the leading-in wires 22 and 23 may be connected to one terminal of an electrical circuit (not shown), and the other terminal may be applied successively to the-adjacent extremities of the filament and leading-in wires, For the purpose oi fusing the said parts together and making good electrical connections betwemi them. If desired, the adjacent extremities of the filament and the leadingin wires may be brought into intimate electrical contact by covering'them with a layer of conducting; paste.

If the filaments are of such a characbn that they are oxidized when heatml in air for the purpose of rendering them pliable, the whole apparatus may obviously be in troduced into a vessel filled with an inert g. 1.

It is obvious that the apparatus h-nds itself to the mounting of two or more iilaments at a time upon a stem.

1 claim as my invention l. A machine of the character lescriliied comprising a, stoadying and positioning member for the work. a yielding clamp, a work-holder, and means for mounting the yielding clamp and work-holdtnr for independent revolution around the stczulying and positioning member.

2. A machine of the character described comprising a stcadying and positioning member for the work, a. rotatable mandrel, a pin adjacent to the mandrel, means for mounting the pin for revolution around the mandrel, a work-holder, and means for mounting the m f'ndrcl and the work-holder for revolution around the stcadying and positioning member.

3. A machine of the character described comprising a steadying and positioning member for the work, a rotatal'ile mandrel, a. pin adjacent to the lllfllldl'l means for mounting the pin for revolution around the mandrel, a work holder, and means for mounting the mandrel and the work-holder for independent revolution around the steadying and positioning l'nOlTilKl.

l. A machine oi the character described comprising a. steadying and positioning member for the work, a rotatable mandrel, a pin adjacent to the mandrel, a brake to control the rotativo movement of the man drcl, a work holder, and means for mounl-- ing the mandrel and the wrn-k-holdi-r for revolution around the steadyin'g and post tionin member.

5. A machine oi the character described comprising means for steadyingr and positioning the work, means for yioldingly clamping a part of the work. means For holding another part of the work, and means for mounting the yielding clamping means and the said holding means for iiu'lepei'ulent revolution around the stcadyirr and positioning means.

6. Apparatus for a 'iplying a wrapping to a cylindrical member cr'nnprising means for j'iositimiing the cylindrical member, a clamp for one end of the wrapping, spaced l ll 0 l 1. ii

maaeeo a from said positioning means and revoluble subscribed my name this 20th day of J anuihereabout, means for revolving said clamp ary, 1910.

about said positioning means and resilient means for allowing said clamp to approach GEORGE ATWOOD' said positioning means as the Wrapping is W'itnesses:

applied to the cylindrical member.v GEORGE P. SGHOLL, In testimony whereof, I have hereunto R. C. KAnoHNER. 

